facexy is a command for turtles that sets the turtle’s heading towards the point (x,y). The syntax of this command is facexy [number number]. For example:
ask turtle 1 [facexy 2 3]
This asks turtle 1 to face towards the point 2,3.
Note: that if the turtle is on the point (x,y), then the turtle's heading won't change.
Once you mastered the facexy primitive, don't stop there. Check out the resources below to improve your NetLogo skills.